Continuing the conversation about righteousness, Paul returns again to the theme of choice. For him it is obvious that the question of belonging or not belonging to the people of God is determined by readiness to accept the witness about the Kingdom that the Savior brought into the world. Of course, no faith can be spoken of if there is no witness; witness remains the foundation without which there is no speaking of the spread of the Kingdom in our world, still not fully transformed (vv. 14-15). But, on the other hand, acceptance of the Kingdom can only be voluntary, and therefore each person decides for himself whether he will listen to the witness or not.
Of course, much here depends on the witness itself. It is no accident that the apostle speaks of faithfulness connected with "hearing," that is, with the ability to hear, and connects hearing with the word of God, with the revelation without which it is impossible not only to enter the Kingdom, but even simply to understand what is being discussed and where the witness is calling the listener (vv. 16-17). Witness to the Kingdom, by definition, is never a purely human matter; this applies both to the one who bears witness and to the one who hears the witness and accepts it.
But revelation is given only to the one who seeks a meeting with God and is ready to accept what God will reveal to him. It is no accident that the apostle speaks of stubbornness as the main obstacle to accepting witness, meaning not only the witness of the apostles about the Kingdom, but also the witnesses of the prophets of old about what God expected from His people in those days (vv. 18-21). As we can see, the reason for rejecting witness has been the same in every age, and in the end it came down to what the listener chose: his own ideas, or the generally accepted ideas, about God and about what He expects from a person, or the witness of those to whom the will of God had been revealed directly. Earlier the issue was the choice of a path; now the issue was the Kingdom. But both then and now, this choice determined a person's fate before God, and therefore his fate in eternity.
